I like it, it's pretty and unusual. Yet people would still know how to spell and pronounce it.
I like it a lot! I don't think it's a problem that they both end in A. It still sounds good together.
Zara and Matilda don't go together, in my opinion.
Zara is so exotic and Matilda...meh, it's not a name that I like... I love the Tilda part, but adding Ma to the beginning makes it frumpy.
Zara is great, but I would go with a different middle. Something equally elegant.
Zara Isabelle or Isabella
Zara Delphine or Delfina
All seem well matched to me.
I like it!